Reversing linear solenoid

A drive having a reversing linear solenoid which is polarized in a permanent magnetic manner, the reversing linear solenoid having a frame, an armature or armatures, at least one air gap formed between the frame and the armature or armatures, at least one permanent magnet, and at least one excitation coil, wherein the permanent magnet creates a magnetic flux in the air gap, wherein the excitation coil creates a magnetic flux in the same air gap as the permanent magnet, such that the magnetic flux created by the permanent magnet in the air gap can be at least partly compensated by counter-excitation of the excitation coil, and wherein the reversing linear solenoid has a first and a second end stroke position, a center stroke position disposed between the end stroke positions and the armature or armatures,

• wherein the drive has a spring system which exerts a force in a direction of the center stroke position on the armature or at least one of the armatures in each of the two end stroke positions, wherein the spring system and the reversing linear solenoid are coordinated with one another such that the armature or at least one of the armatures is held in a permanent magnetic manner against a spring force in each of the two end stroke positions in a static, non-energized case,
• wherein the spring system is designed such that potential energy stored therein by movement of the armature or armatures in its/their end stroke positions is of equal magnitude in both end stroke positions, and
• wherein a first face of the armature or armatures abutting a first face of a frame in the first end stroke position has a first geometry different from a second geometry of a second face of the armature or armatures abutting a second face of the frame in the second end stroke position.